Lead Free Brass C89833 Sand Castings

Alloy C89833, Lead Free Red Brass, has 87% Copper 5% Tin 3% Zinc and 2% Bismuth. It contains virtually no Selenium but does utilize Bismuth as a Lead substitute. This alloy has been recognized as an acceptable material for California Prop 65. It has good machinability, polishing and plating characteristics. It is suitable for being joined by soldering (excellent) and brazing (good).

Typical applications for sand casting alloy C89833 are water meters, valves, pump components, pipe fittings, plumbing goods, water pump impellers, housings and small gears.

opper-bismuth UNS C89833 has a copper content of not less than 86%.

The following table shows the mechanical properties of UNS C89833 sand cast alloy as a function of heat treatment.

TemperTensile Str.Yield Str.Elong.
M01258MPa (37ksi)119MPa (17ksi)28%

The chemical composition of UNS C89833 copper alloy is outlined in the following table.


C89833 Product description: Bismuth tin bronze

Shape/Form: semi-finished; mill stock or near net shapes; anode; bar stock; billet/bloom; squares; hex; plate; profile or structural shape; flats/rectangular bar
Compliance: C89833 is compliant with key legislation including (1) Federal Safe Drinking Water Act – SDWA, (2) S. 3874 Federal Reduction of Lead in Drinking Water Act, (3) California AB1953, (4) Vermont Act 193, and is NSF/ANSI/CAN 61-2022 compliant*Consult mill for wall thickness

Typical uses

Industrial: corrosion-resistant/pressure-tight castings, impellers, pumps

Chemical composition

Chemical composition provided by CDA
1Ni value includes Co.
Note: Cu + sum of named elements, 99.3% min. Single values represent maximums.


Copper alloy UNS No.Machinability ratingDensity (lb/in3 at 68 °F)

Mechanical properties

Tensile strength, minYield strength, at 0.5% extension under load,, minElongation, in 2 in. or 50 mm minBrinell hardness (500 kg load)Remarks
ksiMPaksiMPa%typical BHN

Physical properties

Physical properties provided by CDA
US CustomaryMetric
Melting point – liquidus1877 °F1025 °C
Melting point – solidus1454 °F790 °C
Density0.317 lb/in3 at 68 °F8.78 gm/cm3 at 20 °C
Specific gravity8.788.78
Electrical conductivity17.8% IACS at 68 °F0.103 MegaSiemens/cm at 20 °C
Thermal conductivity41 Btu/sq ft/ft hr/°F at 68 °F71 W/m at 20 °C
Coefficient of thermal expansion 68-39213 · 10-6 per °F (68-392 °F)22.5 · 10-6 per °C (20-200 °C)
Specific heat capacity0.085 Btu/lb/°F at 68 °F356.1 J/kg at 20 °C
Modulus of elasticity in tension15500 ksi106869 MPa

C89833 Abstract

Concast C89833 is a lead-free casting alloy that can be interchangeable with C836 (Alloy Digest Cu-317, August 1976). C89833 is classified as a bismuth tin bronze. See also Federalloy I-844, Alloy Digest Cu-611, March 1997. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. Filing Code: Cu-891.

Fabrication properties

Fabrication properties provided by CDA